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### Article Number - A46460062084

Vol.11(23), pp. 247-254 , December 2016
DOI: 10.5897/SRE2016.6420
ISSN: 1992-2248

Full Length Research Paper

## Quantum fluctuations of the spacetime geometry in the spectral scheme#

##### Masafumi Seriu
• Masafumi Seriu
• Mathematical and Quantum Science Group, Division of Physical Science, Graduate School of Technology and Engineering, University of Fukui, Fukui 910-8507, Japan.

Received: 06 May 2016  Accepted: 09 September 2016  Published: 15 December 2016

The spectral scheme for spacetime geometry is a totally new framework for quantitatively describing the spacetime geometry in terms of the spectra of a certain elliptic operator (typically the Laplacian operator) on the space in question. The central idea of the framework can be symbolically stated as Let us hear the shape of the Universe!" There are several advantages of this framework compared to the traditional geometrical description in terms of the Riemannian metric. After sketching the basics of the spectral scheme, we give a new formula for the Einstein-Hilbert action, which is a central quantity for the general relativity theory, in terms of the spectral scheme. We then pay attention to its application to the quantum universes and see how the quantum fluctuations of spacetimes can be effectively described in terms of the spectral scheme.

Key words: General relativity, spacetime structures, spectral scheme, cosmology.

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 APA Seriu, M. (2016). Quantum fluctuations of the spacetime geometry in the spectral scheme#. Scientific Research and Essays, 11(23), 247-254. Chicago Masafumi Seriu. "Quantum fluctuations of the spacetime geometry in the spectral scheme#." Scientific Research and Essays 11, no. 23 (2016): 247-254. MLA Masafumi Seriu. "Quantum fluctuations of the spacetime geometry in the spectral scheme#." Scientific Research and Essays 11.23 (2016): 247-254. DOI 10.5897/SRE2016.6420 URL http://academicjournals.org/journal/SRE/article-abstract/A46460062084

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